English: Dashed lines denote servers (called "instances" for Mastodon and "pods" for Diaspora) on which users (circles) have an account. Solid lines denote communication happening between users on different servers, with different colours for different protocols.
The Diaspora software only supports only the Diaspora protocol; Mastodon and PeerTube mainly use ActivityPub. Friendica can use both ActivityPub and Diaspora protocols, which means Friendica users can communicate with all other software represented here.